docs: add LangChain video walkthroughs and tutorial emoji

[nishithatanukunuri]

Adds the embedded video walkthroughs and a small title fix across three docs pages.

Changes

• integrations/langchain.mdx - embed the LangChain integration walkthrough video, replacing the "coming soon" placeholder.
• cookbook/langchain-resume-screening.mdx - embed the resume-screening cookbook video under "Watch the Video Guide".
• cookbook/data-extraction-tutorial.mdx - add a graduation-cap emoji to the "Resume & profile extraction" tutorial title, matching the sibling cookbook pages (CSV sanitizer, LangChain resume).

All embeds follow the existing iframe convention used elsewhere in the docs.

Summary by CodeRabbit

• Documentation
  • Added visual styling to tutorial header
  • Embedded video guides now available for resume screening and LangChain integration tutorials

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 43231082-d032-4c37-8730-661d7ae3493b

📥 Commits

Reviewing files that changed from the base of the PR and between b4e28cd and eca6452.

📒 Files selected for processing (3)

• cookbook/data-extraction-tutorial.mdx
• cookbook/langchain-resume-screening.mdx
• integrations/langchain.mdx

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📝 Walkthrough

Walkthrough

Three MDX documentation files are updated: the data-extraction-tutorial.mdx frontmatter title gains a 🎓 emoji, and two "Video walkthrough coming soon." placeholders in langchain-resume-screening.mdx and integrations/langchain.mdx are replaced with embedded YouTube iframes.

Changes

Documentation Updates

Layer / File(s)	Summary
Title emoji and YouTube embed replacements cookbook/data-extraction-tutorial.mdx, cookbook/langchain-resume-screening.mdx, integrations/langchain.mdx	Frontmatter title in the data-extraction tutorial gains a 🎓 emoji prefix; LangChain resume screening cookbook and LangChain integrations page each replace a "coming soon" placeholder with a YouTube iframe embed (video id QBZDKzjuA60).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• zerogpu/docs#4: Introduced the cookbook/langchain-resume-screening.mdx page that this PR updates by replacing its video placeholder with an embedded YouTube iframe.

Poem

🐇 A title gets dressed with a cap and a gown,
No more "coming soon" to make learners frown!
A video appears where a placeholder stood,
Embedded and ready — as rabbits knew it would.
🎓 Hop, watch, and learn — the docs look so good! 🎥

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the primary changes: adding video walkthroughs and a tutorial emoji across multiple documentation files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs-langchain-video-walkthroughs

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